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Theory for the Nonlinear Magneto-Optical Kerr-Effect at Ferromagnetic Transition Metal Surfaces

Published online by Cambridge University Press:  03 September 2012

U. Pustogowa ,
W. Hübner  and
K. H. Bennemann
U. Pustogowa
Affiliation:
Institute for Theoretical Physics, Freie Universität Berlin, Arnimallee 14, 1000 Berlin 33, Germany
W. Hübner
Affiliation:
Institute for Theoretical Physics, Freie Universität Berlin, Arnimallee 14, 1000 Berlin 33, Germany
K. H. Bennemann
Affiliation:
Institute for Theoretical Physics, Freie Universität Berlin, Arnimallee 14, 1000 Berlin 33, Germany
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Abstract

The nonlinear Magneto-optical Kerr-effect (NMOKE) has been proven to be an ultrafast spectroscopie probe of the magnetic and electronic properties of ferromagnetic surfaces. Extending our previous theory we calculate the linear and nonlinear Magneto-optical Kerr-spectra of Fe. The results for the nonlinear Kerr spectra are compared with recent experiments on a Fe (110) surface. We derive and discuss general features of the nonlinear Kerr-effect, especially the details of its dependence on exchange interaction and Fermi-level crossings in the Stoner picture and beyond, frequency, and spin-orbit interaction. Furthermore we demonstrate how various electronic material properties, such as d-band width, s-d hybridization or band narrowing due to electronic correlations or caused by geometry (reduced coordination number in thin films), can be extracted from the spectra. As an example, we compare the linear and nonlinear Kerr-spectra of Fe to those of Ni. The extension of our theory to the Kerr spectra of thin magnetic films films as well as of hidden magnetic interfaces occurring in sandwiches and multilayers is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 313: Symposium Q1 – Magnetic Ultrathin Films, Multilayers and Surfaces/Magnetic Interfaces-Physics and Characterizations , 1993 , 445
Copyright
Copyright © Materials Research Society 1993

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References

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